Invisible user
I use Vivaldi a lot, but don't surf with it very much at all. I built a LAN of things for my homestead, and use it to work with the various web pages the things emit. None of this goes out on the internet by design. Unless someone is basing browser useage on one a day hits to the weather service, they're not seeing my all day, every day use of it.
I find it's good because of the tab tiling feature - for example I can have several observation cameras (from raspberry pies) on the screen at a time. Or plots, or... can't do that in chrome.